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Medicine United States Science

Pfizer and Moderna Vaccines Are 94% Effective Against COVID-19 Hospitalization In Older Adults, Says CDC (thehill.com) 60

According to a new study from the CDC, Pfizer and Moderna vaccines were 94 percent effective in preventing hospitalization for COVID-19 among people age 65 and older. The Hill reports: The study provides new evidence on the benefits of vaccination, and builds on results from the clinical trials by adding real-world evidence from 417 hospitalized adults in 14 states from January to March. "This multisite U.S. evaluation under real-world conditions suggests that vaccination provided protection against COVID-19-associated hospitalization among adults aged [65 and older]," the study states.

The 94 percent efficacy rate was for people who were fully vaccinated, meaning they were at least two weeks past their second dose. For people who were only partially vaccinated, meaning they were more than two weeks past the first dose but less than two weeks past the second dose, effectiveness was 64 percent. Notably, no significant effectiveness was found for people who were less than 14 days past their first dose, highlighting that it takes some time for protection to kick in and that people should not disregard precautions right away. The results show that as vaccinations spread, hospitalizations and deaths are set to decline, the CDC said.

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Pfizer and Moderna Vaccines Are 94% Effective Against COVID-19 Hospitalization In Older Adults, Says CDC

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  • For people who were only partially vaccinated, meaning they were more than two weeks past the first dose but less than two weeks past the second dose, effectiveness was 64 percent.

    Ties into the hesitancy story with at least a half-full glass response.

    • For people who were only partially vaccinated, meaning they were more than two weeks past the first dose but less than two weeks past the second dose, effectiveness was 64 percent.

      Ties into the hesitancy story with at least a half-full glass response.

      A full two-shot sequence cuts the hospitalization rate by a factor of 25. Taking just the first shot cuts it by a factor of three. That says to me the glass is only a few drops over 1/9th full.

      • A full two-shot sequence cuts the hospitalization rate by a factor of 25. Taking just the first shot cuts it by a factor of three. That says to me the glass is only a few drops over 1/9th full.

        Half-credit because you didn't show your work.

  • Curious (Score:4, Interesting)

    by nehumanuscrede ( 624750 ) on Wednesday April 28, 2021 @11:27PM (#61326450)

    I'm curious how well they'll work when the Indian variants return to the US . . . . .

    That will be rather interesting data to watch methinks.
    Hopefully, the vaccines work as advertised but, time will tell.

    • Re:Curious (Score:5, Funny)

      by Anonymous Coward on Wednesday April 28, 2021 @11:40PM (#61326488)

      You can call it the H1B variant...

      Thanks I'll be here all week.

    • Re:Curious (Score:5, Interesting)

      by AmiMoJo ( 196126 ) on Thursday April 29, 2021 @04:11AM (#61326942) Homepage Journal

      I'm curious how effective they are at preventing Long COIVD and in protecting people with auto-immune conditions. Just because you didn't need to go to hospital doesn't mean you can't suffer some vary nasty long term effects.

    • It's not the Indian variants that are the most scary, at least not yet. One of the Brazilian variants has flipped the age range, the ICU's in Brazil are now fully of 20 and 30 year olds, not the 50+ they were with the original virus. And this variant IS already in the US and EU, and there are reports of a variant that has merged the higher infectivity of the British variant with the lower age death rate of the Brazilian variant that's already been found.

      Each mutation is a risk the virus will evolve out of p

  • Something I've been curious about lately is what happens to the muscle cells the mrna vaccines alter. Specifically, does the immune system attack them if they're presenting all these spike proteins?

    I have found it difficult to search this kind of thing. Google seems to have their thumb really heavily on all covid search results. I ask any question about covid and I get a presorted list of 15 approved websites making sure that I know Covid is very bad for me. I've manually looked through a few message boards

    • Re: (Score:2, Interesting)

      by Anonymous Coward

      The reasons [sciencemag.org] it's muscle [abc.net.au] cells.
      So it's not only the muscle cells that become infected but a couple other types as well.

      Ass pull theory time.
      Once the immune system is trained to recognise the spike. All those previously infected cells will be waving the spikes and so the immune system will take care of them. Either telling them to die, or destroying them if they refuse.

      Deep pull. Once the cells stop making the spike. (the rna will degrade naturally anyway) not sure what happens to the spikes that get waved

      • Like how the mRNA eventually breaks down, proteins do to. Even if you never developed an immune response to the spike protein, it would eventually be reabsorbed by the cells after breaking into amino acids from other reactions. Molecules like free radicals are famous for this although others do exist like the components with the lysosome's. The immune response trigger accelerates the process because now the body is creating it's own proteins to bind to the spike proteins and it can't distinguish a protein f

        • by jabuzz ( 182671 )

          mRNA breaks down real fast in the body. Hell it breaks down fast enough outside the body, that's why they where storing Pfizer at -80 Celsius.

          One of the issues with getting mRNA vaccines to work was to find ways to make it last long enough in the body to actually do something. This is why they technically are not mRNA as the uracil nucleotide's have been replaced with a synthetic match, which works on the ribosomes but trick the immune system into thinking they are not mRNA, which of course technically they

      • Once the immune system is trained to recognise the spike. All those previously infected cells will be waving the spikes and so the immune system will take care of them. Either telling them to die, or destroying them if they refuse.

        Wait wait wait, I worked hard and paid a lot of money for these muscle cells, now I'm supposed to sacrifice them so that I or someone's stupid grandma I breathe on won't die?! Fuck you, science!

        ... seriously, where I live one of the most popular questions on the "Call in and ask the Public Health Doctor" radio segments has been: "Can I still go to the gym?" Yes, please do. There's a potentially deadly respiratory virus going around, that spreads by micro droplets, go congregate in a place where everyone

    • AFAIK, the spike proteins embed into the muscle cells' membranes, so your immune system should attack it. After the cells break apart, a lot of spike proteins that never made their way into the cell membrane (because they were in the cell) are recognized by your immune system.

    • The mrna vaccines do not alter cells, muscle or otherwise. mrna just asks a cell, "Hey bro, can you synthesize some protein for me from these plans?"

      The virus vector vaccines (J&J, AZ, Sputnik V), as far as they have been explained, do alter your cell DNA to be transcribed to RNA to synthesize protein antigens.

      The Novavax vaccine nearing US approval is unique in just giving you the spike protein without enlisting participation from anything except from your immune cells. I would have held out for

      • by bws111 ( 1216812 )

        According to the CDC [cdc.gov], the viral vector vaccines 'do not affect or interact with our DNA in any way'.

        • So they make this claim in for-the-layperson language.

          https://www.medicalnewstoday.c... [medicalnewstoday.com]

          The viral vectors are DNA viruses, yes? And once they enter some of your cells, they transcribe to RNA that in turns makes the Spike, that appears on the surface of those of your cells? And this takes place without the vector inserting a section of DNA into that of your cell?

  • Original trials (Score:5, Informative)

    by gnasher719 ( 869701 ) on Thursday April 29, 2021 @04:54AM (#61326978)
    In the original trials Pfizer reported the numbers both two and three weeks after the first injection, and the protection did grow considerably. I think it was something like "statistically noticeable' after 1 week, about 50% after two weeks, and 90% after three weeks. It just takes time to build up antibodies.

    Even so, two weeks should gives your immune system a head start even if you have to go to hospital, so it would be interesting to know if cases were different and more people recovered or people recovered more quickly.
  • One shouldn't read too much into the 94% effectiveness. The confidence intervals are huge because the number of patients in the study is small. For example, only a single fully vaccinated patient tested positive (out of 187 positive tests) whereas 18 fully vaccinated patients tested not-positive (out of 230). Roughly speaking, the 18:1 is the 94%. (The 18 and the 1 have to be adjusted for the different sizes of the groups so it's really (18/187)/(1/230) = 22, so you (a 65+-year-old) are about 22 times
  • Governments still insist you wear a mask, or better yet, two or three masks, even after these "highly effective" vaccinations. Why?

  • Can anyone cut through the sensational scare tactic headline alarmist BS and just say if the new India strain is infecting vaccinated and previously infected people or not? I can't find a straight answer online ANYWHERE from a reliable source.

    Yes, the slashdot comment section is a reliable source lol.

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